Sciweavers

1450 search results - page 7 / 290
» On the Complexity of Hardness Amplification
Sort
View
CORR
2007
Springer
217views Education» more  CORR 2007»
13 years 7 months ago
Hard constraint satisfaction problems have hard gaps at location 1
An instance of the maximum constraint satisfaction problem (Max CSP) is a nite collection of constraints on a set of variables, and the goal is to assign values to the variables ...
Peter Jonsson, Andrei A. Krokhin, Fredrik Kuivinen
ICC
2007
IEEE
245views Communications» more  ICC 2007»
14 years 1 months ago
Low Complexity MMSE Vector Precoding Using Lattice Reduction for MIMO Systems
—In this paper, a lattice-reduction-aided (LRA) With such an approximation, the complexity of VP is greatly minimum mean square error (MMSE) vector precoding (VP) is reduced. pro...
Feng Liu, Ling-ge Jiang, Chen He
ITA
2000
13 years 7 months ago
Construction of very hard functions for multiparty communication complexity
We consider the multiparty communication model de ned in 4] using the formalism from 8]. First, we correct an inaccuracy in the proof of the fundamental result of 6] providing a lo...
Ján Manuch
SIGAL
1990
221views Algorithms» more  SIGAL 1990»
13 years 11 months ago
Complexity Cores and Hard Problem Instances
Many intractable problems such as NP-complete problems (provided P = NP) have easy subproblems. In contrast, we investigate the existence and the properties of inherently hard sub...
Uwe Schöning
RAS
2008
109views more  RAS 2008»
13 years 7 months ago
When hard realtime matters: Software for complex mechatronic systems
A still growing number of software concepts and framworks have been proposed to meet the challenges in the development of more and more complex robotic systems, like humanoids or n...
Berthold Bäuml, Gerd Hirzinger